What does Jeff stand for?

Jefferson's Virginia General Court Reports - A publication (DLA)

JeffBanks, Inc. - NASDAQ symbol (SAG)

Jefferson National Corp. (SAUO)

Jefferson National Expansion Memorial - Saint Louis, MO - National Park Service designator (NPSD)

Jefferson National Expansion Memorial National Historic Site

Joint Evaluated Fission and Fusion (ALPHA)

Judiciously Efficient Fixed Frame - Computer science (MCD)